You people really are something. Have you ever heard the expression, "Just because you can, doesn't mean you should?"
I can legally put every single firearm I own into the trunk of my car with thousands of rounds of ammunition and drive through Washington DC on my way to Virginia. That doesn't mean cruising past the White House on this little road trip is a sensible decision, never mind parking nearby while I grab a bite to eat or take a few photos.
Fucking common sense says don't park your fucking car a block away from the United States Capitol with anything inside that could be misidentified as an explosive device. It also says you should keep your drivers license current and in good standing. You think they just cited him for that offense without checking to see that he was actually operating the vehicle? You are familiar with traffic cameras right? Hell, he probably admitted that he was driving when they interviewed him.
He's not getting the book thrown at him in any of the media accounts I've read, he's getting the same treatment he would have received if he was pulled over for a routine traffic stop. If it's his first offense he'll probably get off with a small fine and a conviction for a violation rather than a misdemeanor. There's no fucking miscarriage of justice here.